185669-66-3Relevant academic research and scientific papers
Base-mediated cascade amidination/: N -alkylation of amines by alcohols
Hu, Mao-Lin,Jia, Xiaofei,Liang, Zuyu,Lu, Fenghong,Zhang, Chunyan,Zhang, Guoying
supporting information, p. 10489 - 10492 (2020/10/02)
A base-mediated cascade amidination/N-alkylation reaction of amines by alcohols has been developed. For the first time, nitriles have been identified as an efficient and benign water acceptor reagent in N-alkylation. Notably, the procedure tolerates a series of functional groups, such as methoxyl, halo, vinyl and hetero groups, providing a convenient method to construct different substituted diamino compounds, 15N labeled amine and could be scaled up to 1 mol scale offering 138.7 g of the desired product in good yield in one-pot. Mechanistic studies provided strong evidence for the amidination of amines with nitriles facilitated by t-BuOK.
A microwave-assisted SmI2-catalyzed direct N-alkylation of anilines with alcohols
Gour, Jitendra,Gatadi, Srikanth,Malasala, Satyaveni,Yaddanpudi, Madhavi Venkata,Nanduri, Srinivas
, p. 7488 - 7494 (2019/06/14)
A new protocol for the alkylation of aromatic amines has been described using alcohols in the presence of SmI2 as a catalyst with the generation of water as the sole byproduct. The reaction proceeds under MW conditions and selectively generates monoalkylated amines. This protocol features a broad substrate scope and good functional-group tolerance with moderate to high yields.
Selective reductive amination of aldehydes from nitro compounds catalyzed by molybdenum sulfide clusters
Pedrajas,Sorribes,Junge,Beller,Llusar
supporting information, p. 3764 - 3768 (2017/08/21)
Secondary amines are selectively obtained from low value starting materials using hydrogen and a non-noble metal-based catalyst. The reductive amination of aldehydes from nitroarenes or nitroalkanes is efficiently catalyzed by a well-defined diamino molybdenum sulfide cluster in a one-pot homogeneous reaction. The integrity of the molecular cluster catalyst is preserved along the process.
Direct Alkylation of Amines with Alcohols Catalyzed by Base
Li, Qiang-Qiang,Xiao, Zu-Feng,Yao, Chuan-Zhi,Zheng, Hong-Xing,Kang, Yan-Biao
supporting information, p. 5328 - 5331 (2015/11/18)
A base-catalyzed/promoted transition-metal-free direct alkylation of amines with alcohols has been developed, giving the desired amines in generally high yields from either aromatic or aliphatic alcohols. On the basis of the 1H NMR and in situ IR (React-IR) monitoring experiments, isotope-labeling experiments, as well as control experiments, a novel "hemiaminal" model is proposed to understand the mechanism, which explains the formation of the "extra" aldehyde in the reaction.
Cobalt-Catalyzed Alkylation of Aromatic Amines by Alcohols
R?sler, Sina,Ertl, Michael,Irrgang, Torsten,Kempe, Rhett
supporting information, p. 15046 - 15050 (2016/01/25)
The implementation of inexpensive, Earth-abundant metals in typical noble-metal-mediated chemistry is a major goal in homogeneous catalysis. A sustainable or green reaction that has received a lot of attention in recent years and is preferentially catalyzed by Ir or Ru complexes is the alkylation of amines by alcohols. It is based on the borrowing hydrogen or hydrogen autotransfer concept. Herein, we report on the Co-catalyzed alkylation of aromatic amines by alcohols. The reaction proceeds under mild conditions, and selectively generates monoalkylated amines. The observed selectivity allows the synthesis of unsymmetrically substituted diamines. A novel Co complex stabilized by a PN5P ligand catalyzes the reactions most efficiently. Sustainable C-N bond formation: An easily accessible Co complex efficiently catalyzes the alkylation of aromatic amines by alcohols. The mild reaction conditions permit the use of sensitive functional groups (I, Br) and the observed selective monoalkylation allows the synthesis of unsymmetrically alkylated diamines.
Ullmann-type C-N coupling reaction catalyzed by CuI/metformin
Zhang, Chao,Zhan, Zhajun,Lei, Min,Hu, Lihong
, p. 8817 - 8821 (2015/03/05)
A facile and efficient method for Ullmann-type C-N coupling reaction of amine and aryl halide catalyzed by CuI/metformin in EtOH is described. The advantages of this method are the use of an inexpensive and readily available catalyst and ligand, easy workup, shorter reaction time, improved yields, and the use of green solvent. Furthermore, this procedure is applied successfully for the modification of natural products, such as Vindoline and Tabersonin.
An improved synthesis of imidazo[4,5-b]pyridines and imidazo[4,5-b]pyrazines by palladium catalyzed amidation using xantphos in a 1,4-dioxane:tert-amyl alcohol solvent system
Rosenberg, Adam J.,Ahmed, Ijaz,Wilson, Robert J.,Williams, Theresa M.,Kaminsky, Lauren,Clark, Daniel A.
supporting information, p. 3465 - 3470 (2015/01/09)
Herein an improved protocol for the synthesis of imidazo[4,5-b]pyridines and imidazo[4,5-b]pyrazines using a palladium-catalyzed amidation that utilizes Xantphos as an ancillary phosphine ligand is reported. The use of a binary solvent system comprised of
Synthesis and microbiological evaluations of (N-heteroaryl)arylmethanamines and their Schiff bases
Fioravanti,Biava,Donnarumma,Porretta,Simonetti,Villa,Porta-Puglia,Deidda,Maullu,Pompei
, p. 643 - 652 (2007/10/03)
The synthesis as well as the antimicrobial and antiviral activities of new (N-heteroaryl)arylmethanamines and their Schiff bases are reported. None of the tested compounds showed activity against Herpes simplex virus type 2 and against Gram positive and Gram negative bacteria. Weak or moderate activity on poliovirus Sabin type 1, on reverse transcriptase and against Cryptococcus neoformans was shown by some of the tested compounds. Viceversa several synthesized compounds exhibited a moderate or good activity against strains of Candida albicans, while only some of the tested compounds were found moderately active against strains of Candida sp. Instead numerous new compounds 3 or 4 were active as control against isolates of plant pathogenic fungi. The obtained results are discussed on the basis of structure-activity relationships.
